Celsum helps Gammadot to increase the pressure

Celsum Technologies has supplied a ACR 2100 capillary extrusion rheometer to Gammadot Rheology Testing in order to allow testing of materials over a wide range of shear rates and temperatures

A capillary extrusion rheometer is a very accurately controlled piston-driven extruder which allows the test material to be expressed at a series of user-defined speeds through precision-engineered orifices or dies, and the pressure generated at each speed is recorded.

The characteristic graph or rheogram is useful for predicting processing behaviour and may also be used to deduce information about the specimen's chemical and physical nature.

As such, it is an extremely useful tool for analyzing and trouble-shooting processing problems.

Said Roy Carter, MD of Celsum: "We are extremely pleased to be able to help Gammadot to enhance their established range of rheological testing services with the addition of this fine instrument.

"The ACR 2100 rheometer has a maximum pressure capability of 30,000psi (2100bar) and maximum temperature of 450C, allowing many types of materials to be tested under realistic processing conditions.

"As well as shear viscosity, the ACR 2100 may be used to determine extensional viscosity, pressure coefficient of viscosity, no-flow temperature, and other process-relevant parameters".

Mark Edwards, principal of Gammadot, said: "I am delighted that we have a new capillary rheometer to add to our current suite of test equipment.

"This will expand the range of contract research and testing services that we can offer our customers, and will greatly assist our development".

Celsum Technologies' other products include the T2SR temperature and time scanning rheometer, extrusion dies, MXR2 extensional rheometer, the CTPT and CTPVT workability testers for fresh cement and concrete, and a wide range of signal conditioning and process control instrumentation, radio modems, accelerometers, pressure and force sensors, dataloggers, and an array of other instruments.

Gammadot offers comprehensive rheological and materials characterisation support to the plastics and rubber industries.

Services cover the application of rheology to quality control, failure analysis and process optimisation issues, to providing accurate materials property data (viscosity, PvT and thermals) for flow simulation software packages such as Moldflow and Sigmasoft 3D.

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